<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <!-- 移动端适配 -->
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>自动播放视频</title>
</head>
<body style="margin:0;background:#000;">
    <video 
        controls 
        autoplay 
        muted 
        playsinline
        style="width:100%;height:100vh;object-fit:contain;"
        poster="//your-cdn.com/poster.jpg">
        <!-- 替换为你的国内视频直链 -->
        <source src="https://www.bilibili.com/video/BV1bUKUeCEpL/" type="video/mp4">
    </video>
</body>
</html>